Next, check that each phone jack is working properly.
- Unplug your phone from both the jack and electrical outlet.
- Unplug any other equipment from that same jack.
- After you've unplugged all your equipment, wait 1 minute and then plug in a corded phone.
You should hear a clear, strong dial tone when you test each jack. If you don't, and no other equipment is plugged in, you may have a problem with your inside wiring. Learn how to get it fixed.
If you do hear a clear, strong tone, then continue to plug in additional equipment, one thing at a time, and listen each time. When you hear the noise again, you'll know you've either reached the maximum capacity for that line or the last piece of equipment you connected is causing interference. Try moving that equipment to a different line or installing a radio suppresser or radio/noise filter on your line.